This mistress loves to invest and she does this because she wants to retire early. But she knows that she has to get the money to do so and since she does not have all the money she needs to invest, she has to get it from findom fetish. That is why she ensured that she used someone else's money to do it. Hence why she was involved in findom fetish.
This mistress owed a lot of money to lenders and to other people. She had to find a way to pay it all back and she settled on using her money fetish skills to do it. She did not have anything to lose by doing that and that is why she had to use that method. She did not expect to get a lot and that is why it came as a shock when she actually made a lot of money out of it.